EPBR_a179 — Epb Problem

Full alert identifier: EPBR_a179_epbProblem

Message shown in the car

Parking brake functions degraded Parking brake may not apply or release

Customer facing alert for Electronic Parking Brake issues which occur when caliper is not moving

Electronic Parking Brake caliper motor may be disconnected (idle fault), or no csm requests during retry/fault

Electronic Parking Brake has idle fault, or CSM_RQST_INVALID/CSM_RQST_NONE during retry or fault

Electronic Parking Brake attempts a new operation

These diagnostic fields are associated with EPBR_a179. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
Csm Fault Reason `EPBR_a179_csmFaultReason`	—
Esm Op Trigger `EPBR_a179_esmOpTrigger`	—
Esm State `EPBR_a179_esmState`	—
Esm State Request `EPBR_a179_esmStateRequest`	—
Fault Status `EPBR_a179_faultStatus` 0 NOMINAL 1 RETRY 2 FAULT 3 FAULT IDLE	—
Monitor Fault Status `EPBR_a179_monitorFaultStatus` 0 NOMINAL 1 RETRY 2 FAULT 3 FAULT IDLE	—
Monitor Unit Status `EPBR_a179_monitorUnitStatus`	—
Nonterminal Reason `EPBR_a179_nonterminalReason`	—

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of EPBR_a179.